Accession Number:

ADB006658

Title:

LED X-Y Matrix Display

Descriptive Note:

Final rept. 1 Apr 1972-1 Dec 1974

Corporate Author:

LITTON SYSTEMS INC VAN NUYS CA DATA SYSTEMS DIV

Personal Author(s):

• Kaelin, G. R.
• Nakahara, R. H.
• Piatt, D. M.
• Price, J. G.
• Riggs, A. L.

Report Date:

1975-05-01

Pagination or Media Count:

114.0

Abstract:

The Research and Development Program goal was to fabricate a one-inch by one-inch green LED display surface using flip-chip. It was demonstrated that an LED display of this type can be developed and built for use in the cockpit of advanced military aircraft. Problems experienced with the metallization and isolation in the arrays limited the yield of usable arrays to 24 for a reduced surface area of 12-inch by 34-inch. The display surface has 64 lines per inch capability and is composed of GaP arrays with 8 by 8 LEDs in a 18-inch by 18- inch flip-chip bondable system. The display surface is annotated by a display generator and display processor to simulate an Attitude Director Indicator for aircraft cockpit displays. A contrast enhancement filter also was developed to increase the contrast ratio to a level that would allow use of the display on a 10,000 foot candle ambient. The filter proved very effective. The total program conclusively demonstrated that the concept of using an LED high-resolution display for airborne cockpit use is correct.

Descriptors:

• *DISPLAY SYSTEMS
• *LIGHT EMITTING DIODES
• ARRAYS
• CHIPS(ELECTRONICS)
• COCKPITS
• CONTRAST
• FABRICATION
• GALLIUM PHOSPHIDES
• GREEN(COLOR)
• HIGH RESOLUTION
• INTEGRATED CIRCUITS
• OPTICAL FILTERS

Subject Categories:

• Electrooptical and Optoelectronic Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE